A Proposed Earthquake Warning System Based on Ionospheric Anomalies Derived From GNSS Measurements and Artificial Neural Networks. - Diego Brum; Graciela Eliane dos Reis Racolte; Fabiane Bordin; Eduardo Kediamosiko Nzinga; Maurício Roberto Veronez; Eniuce Menezes De Souza; Ismael Érique Koch; Luiz Gonzaga Jr.; Ivandro Klein; Marcelo Tomio Matsuoka; Vinicius Francisco Rofatto; Ademir Marques Junior (IGARSS, 2019)